73120257 has 12 divisors (see below), whose sum is σ = 120706560. Its totient is φ = 41782968.

The previous prime is 73120241. The next prime is 73120283. The reversal of 73120257 is 75202137.

It is not a de Polignac number, because 73120257 - 2⁴ = 73120241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73120257.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73120237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 580257 + ... + 580382.

It is an arithmetic number, because the mean of its divisors is an integer number (10058880).

Almost surely, 2^73120257 is an apocalyptic number.

It is an amenable number.

73120257 is a deficient number, since it is larger than the sum of its proper divisors (47586303).

73120257 is a wasteful number, since it uses less digits than its factorization.

73120257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160652 (or 1160649 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 73120257 is about 8551.0383580007. The cubic root of 73120257 is about 418.1632890727.

The spelling of 73120257 in words is "seventy-three million, one hundred twenty thousand, two hundred fifty-seven".